# Yac::__construct

(PECL yac >= 1.0.0)

Yac::__construct — Constructor

### Beschreibung

public Yac::__construct(string `$prefix` = "")

prefix is used to prepended to keys, this could be used to avoiding conflicts between apps.

### Parameter-Liste

`prefix`

  String prefix

### Fehler/Exceptions

Throws an Exception if Yac is not enabled. Throws Exception if `prefix` exceeds max key length of 48 (`YAC_MAX_KEY_LEN`) bytes.

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